Safety attachment for presses.



W. A. HANCOCK. SAFETY ATTACHMENT FOR PRESSBS.

APPLICATION FILED NOV. 17, 1914v m y a F. m W W m m 4 W m A 0 1A 5 7 2M PH IWMW a 6 1 a 1 3 8 W/ 2 W A W/ 1 UNITED STATES PATENT. OFFICE.

WILLIAM A. HANCOCK, OF SEYMOUR, CONNECTICUT, ASSIGNOR TO THE SEYMOUR METAL GOODS COMPANY, OF SEYMOUR, CONNECTICUT, A. CORPORATION OF CON- NECTICUT.

SAFETY ATTACHMENT FOR PRESSES.

Specification of Letters Patent.

' Patented Feb; 16, 1915;

Application filed November 17, 1914. Serial No. 872,638.-

getting a hand or finger caught between the punch and the die or die block.

With this end in View I have devised the novel attachment which I will now describe, referring to the accompanyin drawings forming a part of this speci cation and using reference characters to indicate the several parts.

Fi ure 1 is a side elevation of a press showing the application thereto of my novel attachment, the punch being raised and the guard in the retracted position; Fig. 2 a similar View showing the punch lowered and illustratin the operation of theg'uard in use, and ig. 3 is a front elevation of the press, the view corresponding with Fig. las seen from the left. I

As the attachment is equall applicable to all sizes and styles of line ing, stamping and drawing presses, have not illus trated and will not describe a press in detail, and .will refer onlyto the parts oopunch holder, which lies back of the lineof movement of the punch when the latter is in the raised position, moves forward as the punch descends, just clearing the punch, and acts effectively to push thehand or hands of the operator away from the punch before it reaches the lowered position, thus making injury to the operator by the punch practically impossible, the punch being behind the guard during the latter portion of its downward movement. The guard is formed integral with or is secured to a lever 14, shown as normall slightly curved, which is pivoted as at 15, to an arm 16 rigidly secured to the punch. holder. I have shown the longarm of the lever as off-set as at 17, so as to carry the lower end thereof appreciably to one side of the punch and the guard as extending substantmlly at a right angle from the lever. It will be noted that the plane of the guard. 1s substantially parallel with the front of the dieblock, and that the guard extends an appreciable distance on each side of the punchl his is in order to give suiiicient sweep to the guard to insure the removal of the operators hands from under the punch under all conditions of use. The special shape or configuration of the guard is wholly immaterial so far as the invention is concerned. The essential feature is that the guardbe given sufiicient sweep and that as the punch descends it move from the position shown in Fig. 1 toward the position shown in Fig. 2. In the present instance I have shown the guard as provided with an offset shoe 18 which slides over the die block, thereby reducing the contact surface of the guard with the die block, and roviding clearance for work that may proect above the surface of the die block. The short arm of the lever extends beyond the pivot, and a spring 19, the ends of which are shown as connected respectively to arm 16 and to the short arm of the lev r, acts to retain the guard in engagement with the upper surface of the die block. This spring is referably used but is-not essential.

aving thus described my invention I claim:

1. The combination with the punch carrier and die block of a press, of a guard lying back of the line of move ment 0 the punch and resting on the die block, a lever by which said guard is carried and an arm extending from the pumzh carrier to which the lever is pivoted, downward movement of the punch carrier causing forward movementof the guard, the guard clearing the punch and the downward movement of the latter continuing behind the guard.

2. The combination with the punch carrier and die block of a press, of a guard normally lying back of the line of movement of the punch and resting on the die block and a pivoted lever by which said-guard is carried.

3. The combination with the punch carrier and die block of a press, of a guard normally lying back of the line of movement of the punch and resting on pivoted lever by which said guard is car 'ried, and a spring acting to retain the'guard in operative position.

' 4. The combination with the punch, car-. rier anti die block of a press, at a guard nor molly lying back of the line of movement of" the punch and resting on the die block, a ieyer Whose icn'g arm carries the guard, an arm extending from the punch carrier to which the lever is pivoted and a spring confib'piel of this patent may be obtained for the die block, a'

cents each,

nected tothe short arm of the lever and to 15 said arm. n

'5. The combination with the punch carrier and die block of a press, of a guard norrnally lying back of the line of movement of the punch over the die and having a shoe which slides 20 block, and a lever by which the erd is carried.

In t stimony whereof I aflix my signaturein presence of two 'witnesses. A. HANCOCK.

Witnesses: Q v

Lama's A. Wcob,

H. A. LEiGH.

by main: in (instalment of Patents.

wuhiizton, D. 0.? 

